"STEEL,FED STD 66,AISI OR SAE 1010,CARBURIZED AND CASEHARDEN TO 0.020. IN.MIN 0.030 IN. MAX DEPTH,METALLIC HARDNESS RATING ROCKWELL SUPERFICIAL 45N-627 MIN,CAM END 1.50 IN. PARALLEL SURFACES,OTHER END 1.440 IN. MIN 1.442 IN. MAX W/TWO MTG HOLES 0.203 IN. ID,0.748 TO @0.752 IN. C TO C"